CS232451B1 - Armature of high speed electric motor and uts manufacturing method - Google Patents

Abstract

High speed electric machine anchor and a method of making it, especially with oblique provided with a pen under the rotor plate bundle on the shaft support lower and upper pulling ring, bundle of rotor plates, the upper tightening ring is enlarged an aperture and a landed surface adapted perpendicularly to the shaft axis for the locking ring. Placed between lower lower ring without play on the shaft and upper shrink ring fitted with an enlarged tilt opening the shaft, the rotor plate bundle is inserted, including compression rings over the lower and upper auxiliary plates prescribed three or more screws the same axial force and in the compressed state the upper retract the retractable ring with the bearing flat, perpendicular to the shaft axis, for locking ring fixing rotor bundle of shafts on the shaft ensure.

Description

The invention relates to an anchor of a high-speed electric machine and to a method for its manufacture.

High-speed electric machines do not achieve the often planned parameters simply because the anchor of the high-speed electric machine heats up and sags during operation, causing unbalance and thus instability of the whole machine and does not allow the brushes to touch the collector. This deflection is in principle caused by the unequal axial bias of the rotor beam depending on the armature axis.

The anchor packets of high-speed electric machines are produced in such a way that the shaft is finished machined only under the rotor bundle and after the plates and shrink rings have been fitted, the rest of the shaft is turned and grinded. This eliminates any bending of the shaft caused by the rotor plates being bevelled. An uneven axial preload is created in the rotor beam by pressing, which is caused by the shaft bending when the armature is operating and the machine warms up. This deflection is caused by thermal expansion which, at the point of greater axial preload, exerts a greater pressure on the corresponding part of the circumference of the tightening rings.

Author's certificate No. 183 012 addresses these shortcomings in plain shafts without tongues under sheets.

The above-mentioned drawbacks, in particular with the bevel shafts under the sheets, are eliminated with the armature of the high-speed electric machine and the method for its production according to the invention.

It is an object of the invention that the upper shrink ring has an enlarged opening and a modified bearing surface perpendicular to the shaft axis for the securing ring.

The anchor of the high-speed electric machine is manufactured by pressing the intermediate rotor plate bundle including the two clamping rings between the lower clamping ring without play on the shaft and the upper clamping ring with an enlarged tilt hole on the shaft with three prescribed pressures, or With a plurality of screws of the same axial force and in a compressed state, the upper clamping ring is re-turned with a bearing surface perpendicular to the axis of the shaft for the securing ring which secures the rotor plate stack against displacement on the shaft.

The use of the present invention makes it possible to successfully manufacture high-speed rotary and high-power electric machines, particularly suitable for embedding in precision machine tools requiring minimal vibration and high-speed machines at all, the production of which was previously not possible.

The accompanying drawing shows an exemplary embodiment of the invention. The auxiliary bottom plate χ is placed on the baling table JL. The shaft 2 is completely machined and heat-soothed, in a slanted groove under the wedge 10 plates. On the shaft 2 the lower clamping ring χ, the plate of the rotor plates 5 and the upper clamping ring 2 with the hole enlarged so that it can tilt retracting by upper sub-plate according to the inclination of the rotor plate bundle 2 ·

The rotor plate stack 2 is pressed on the shaft 2 into a lower clamping ring 8 between the lower and upper sub-plates 3 and 7 by the prescribed pressure of three or more screws 8 with the same axial force. When the rotor plate bundle is pulled in this way, it is checked whether the shaft has been bent and then the front, mostly inclined, tightening ring 6 is machined so that a bearing surface perpendicular to the axis of the shaft 2 is obtained to engage the retaining ring 2. The securing ring 2 can also be split and then pushes cold into the radially angular groove in the shaft 2.

The anchor produced according to the invention exhibits high thermal stability. Before winding, the check is carried out by heating the anchor to a temperature of 100 to 120 ° C and measuring the centricity.

The use of the present invention is suitable in the manufacture of rotating electrical machines, in particular of higher power, since it makes it possible to produce anchors which do not vibrate at higher speeds and without costly rejects and even the problems of production rejects arising.

Claims (2)

OBJECT OF THE INVENTION An anchor of a high-speed electric machine, in particular with an inclined tongue under a rotor plate bundle, comprising a shaft support, a lower shroud ring, a rotor plate bundle and an upper shroud ring, characterized in that the upper shroud ring (6) has an enlarged opening and modified bearing a surface (11) perpendicular to the shaft axis (2) for the locking ring (9). 2. A method for manufacturing an armature of a high-speed electric machine according to claim 1, characterized in that between the lower clamping ring (4) fitted free on the shaft (2) and the upper clamping ring (6) with an enlarged tilt hole on the shaft (2). , the rotor plate bundle (5) is inserted and retracted including both clamping rings (4) and (6) over the lower and upper sub-plates (3) and (7) at the prescribed pressure with at least three screws (8) with the same axial force and upper clamping the ring (6) is provided with a turning surface (11) perpendicular to the axis of the shaft (2) for the securing ring (9), which secures the rotor plate bundle (5) against displacement on the shaft (2).